Wave overtopping on a vertical seawall in Matrah, Muscat refers to the phenomenon where waves surpass the top of a vertical structure built to protect against coastal erosion and flooding. In this case, the seawall in Matrah, Muscat, is experiencing wave overtopping, which can lead to damage to the structure and surrounding areas. This highlights the importance of proper design and maintenance of coastal defenses to protect against the impacts of wave action. Ongoing monitoring and maintenance are essential to ensure the effectiveness of the seawall in mitigating the risks of coastal flooding and erosion in this region.